Page 1 Keysight 2-Port and 4-Port PNA Microwave Network Analyzers This manual provides documentation for the following models: N5227B (10 MHz - 67 GHz) Service Guide...
Page 2 DOCUMENT OR ANY INFORMATION reproduce, release, perform, CONTAINED HEREIN. SHOULD display, or disclose commercial KEYSIGHT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT computer software or WITH WARRANTY TERMS commercial computer software COVERING THE MATERIAL IN THIS...
Page 3: Table Of Contents
Keysight Support, Services, and Assistance ........
Page 4 Chapter Four at-a-Glance..........4-2 Keysight N5227B Service Guide...
Page 5 Microwave PNA, N5227B ........
Page 6 2-Port Configuration, Option 205 ......... . 6-36 Keysight N5227B Service Guide...
Page 7 Brackets ..............7-41 Keysight N5227B Service Guide...
Page 8 Accessing the Keysight License Manager........
Page 9: Safety And Regulatory Information
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series Service Guide Safety and Regulatory Information Information in This Chapter This chapter provides safety information that will help protect you and your network analyzer. It also contains information that is required by various government regulatory agencies.
Page 10: Safety Symbols
Warning denotes a hazard. It calls attention to a procedure which, if not correctly performed or adhered to, could result in injury or loss of life. Do not proceed beyond a warning note until the indicated conditions are fully understood and met. Keysight N5227B Service Guide...
Page 11: General Safety Considerations
Degree 2 per IEC 61010-1:2001 and 664 respectively. Do not operate the analyzer with the outer cover removed for more than 30 minutes, as this could cause the analyzer to overheat which could result in costly damage. Keysight N5227B Service Guide...
Page 12 The measuring terminals on this instrument are designed to be used with external signals described in Measurement Category I, but NOT with external signals described in Categories II, III, and IV. The input of this instrument cannot be connected to the mains. Keysight N5227B Service Guide...
Page 13: Servicing
LINE switch (disconnecting device). There are no replaceable fuses in the mains input or within the power supply assembly. Keysight personnel: after calibration is completed, attach four “calibration void if seal broken” stickers to the PNA as shown in Figure 1-1.
Page 14 Safety and Regulatory Information General Safety Considerations Figure 1-1 Location of Calibration Stickers on PNA Keysight N5227B Service Guide...
Page 15: Electrostatic Discharge Protection
3. Connect the other end of the cable to the test port and remove the short from the cable. Figure 1-2 shows a typical ESD protection setup using a grounded mat and wrist strap. Refer to “ESD Supplies” on page 6-132 for part numbers. Keysight N5227B Service Guide...
Page 16 Safety and Regulatory Information Electrostatic Discharge Protection Figure 1-2 ESD Protection Setup Keysight N5227B Service Guide...
Page 17: Regulatory Information
This is a marking to indicate product compliance with the Canadian Interference-Causing ICES/NMB-001 Equipment Standard (ICES-001). Direct Current. IP 2 0 The instrument has been designed to meet the requirements of IP 2 0 for egress and operational environment. Keysight N5227B Service Guide...
Page 18: Lithium Battery Disposal
If the battery on the A21 CPU board assembly needs to be disposed of, dispose of it in accordance with your country’s requirements. If required, you may return the battery to Keysight Technologies for disposal. Refer to “Contacting Keysight” on page 2-6 for assistance.
Page 19: General Product Information
Keysight Support, Services, and The Internet address (URL) for on-line assistance. page 2-6 Assistance Service and support options available. Calibration options available. Important information about shipping your analyzer to Keysight for service or repair.
Page 20: Maintenance
Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally. Electrical Maintenance Refer to “Contacting Keysight” on page 2-6 and to Chapter 3, “Tests and Adjustments.” Keysight N5227B Service Guide...
Page 21: Analyzer Options, Accessories, And Upgrades Available
Analyzer Options, Accessories, and Upgrades Available Analyzer Options, Accessories, and Upgrades Available To see a list of the options, accessories and upgrades available for the network analyzers, including ordering information, refer to the Keysight PNA Family Microwave Network Analyzers Configuration Guide, available online at http://literature.cdn.keysight.com/litweb/pdf/5992-1465EN.pdf.
Page 22: Required Service Test Equipment
P = Performance tests, A = Adjustments, T = Troubleshooting, V = System verification c. The recommended model or part number for all equipment listed with a “P” in the Use column is required for proper opera- tion of this test software. Keysight N5227B Service Guide...
Page 23 If an accurate measurement of the dynamic accuracy specification is not required, the E4418A or E4419A can be used. e. This sensor and adapter must be calibrated together by the Keysight factory. The data supplied is only valid as long as the sensor and adapter remain connected.
Page 24: Keysight Support, Services, And Assistance
Service and Support Options The analyzer’s standard warranty period is one year from the time of initial delivery. All repairs require the analyzer to be shipped to the nearest Keysight Technologies service center. Extended warranty periods can be purchased with the initial product purchase.
Page 25: Shipping Your Analyzer To Keysight For Service Or Repair
General Product Information Keysight Support, Services, and Assistance If you do not have access to the Internet, please contact your Keysight field engineer. In any correspondence or telephone conversation, refer to the Keysight product by its model number and full serial number. With this information, the Keysight representative can determine whether your product is still within its warranty period.
Page 26 General Product Information Keysight Support, Services, and Assistance Keysight N5227B Service Guide...
Page 27: Tests And Adjustments
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series Service Guide Tests and Adjustments Information in This Chapter This chapter contains procedures to help you check, verify, and adjust your PNA. — The checks verify the operation of the assemblies in your analyzer.
Page 28 Noise Floor Test — Calibration Coefficients Test — Dynamic Accuracy Test — Dynamic Accuracy at Low Frequency (Available with LFE Option 205/220/420/425) — DC Continuity Test the LFE Board and Test Ports (Available with LFE Option 205/220/420/425) Keysight N5227B Service Guide...
Page 29 LFE Receiver Adjustment – (Available with Option 205, 220, 405, and 420) a. These performance tests are included in the analyzer’s firmware for Option S93898A. b. These adjustments are included in the analyzer’s firmware on all models and options. Keysight N5227B Service Guide...
Page 30: Before You Begin
To reduce the chance of electrostatic discharge, follow all of the recommendations outlined in “Electrostatic Discharge Protection” on page 1-7, for all of the procedures in this chapter. Keysight N5227B Service Guide...
Page 31: Allow The Analyzer To Warm Up
— Use correct end of calibration block — Gage all connectors before first use Making Connections — Align connectors carefully Do Not — Apply bending force to connection — Make preliminary connection contact — Over tighten preliminary connection lightly Keysight N5227B Service Guide...
Page 32 Cleaning connectors with alcohol shall only be done with the instrument’s power cord removed, and in a well-ventilated area. Allow all residual alcohol moisture to evaporate, and the fumes to dissipate prior to ener- gizing the instrument. Keysight N5227B Service Guide...
Page 33: About System Verification And Performance Tests
The analyzer's system specifications are described in the Data Sheet and Technical Specifications documents, available online at www.keysight.com. System specifications are expressed in two ways: — residual errors of the measurement system shown as tabular specification values —...
Page 34: System Verification Procedure
3-11. Certificate of Calibration Keysight Technologies will issue a certificate of calibration upon successful completion of system verification or completion of the performance tests. The certificate of calibration will apply to the “system” (analyzer, calibration kit, test cables, and any necessary adapters) if the system verification procedure is used to confirm the system specifications.
Page 35 If you have a measurement application that does not use all of the measurement capabilities of the analyzer, you may ask your local Keysight Technologies service office to verify only a subset of the specifications. However, this “limited calibration” creates the possibility of making inaccurate measurements if you then use the analyzer in an application requiring additional capabilities.
Page 36: Ansi/Ncsl Z540.3-2006 And Iso/Iec 17025 Verification
After the failure has been corrected, repeat the entire set of performance tests and generate a new set of data. Figure 3-1 ANSI/NCSL Z540.3–2006 and ISO/IEC 17025 Verification Flowchart 1. Stop only in case of a catastrophic failure or cable connector damage 3-10 Keysight N5227B Service Guide...
Page 37: Non-Standards Compliant Verification
Troubleshoot and repair the first problem encountered without continuing to other tests. After you troubleshoot, repair, and adjust, repeat the last failed portion and generate a new set of data. Figure 3-2 Non–Standards Compliant Verification Flowchart Keysight N5227B Service Guide 3-11...
Page 38: Preliminary Checks
Shorts/Opens are attached to ALL ports, to run through the test without stopping. Shorts and opens can be mixed on the test ports. 3. Click Begin. 3-12 Keysight N5227B Service Guide...
Page 39 3-3). The PNA Operator’s Check dialog box will look different for different PNA model numbers and installed options. Some of the tests are performed only if the appropriate options are installed in the PNA. Figure 3-3 Operator’s Check Dialog Box Keysight N5227B Service Guide 3-13...
Page 40: The Test Port Cable Checks
7. The marker annotation on the screen indicates the worst case return loss. Refer to the cable manual to see if it meets the return loss specification. For an example of a typical return loss measurement, see Figure 3-4. 3-14 Keysight N5227B Service Guide...
Page 41 CalSet_1.cst. 6. Connect the test port cable to the PNA Port 1 and perform a 1-port calibration again at the end of the cable. After calibration, save the cal set data as CalSet_2.cst. Keysight N5227B Service Guide 3-15...
Page 42 Help section “Save and Recall a File” if necessary. 10.Refer to the cable manual to see if it meets the insertion loss specification. For an example of a typical insertion loss measurement, see Figure 3-6. 3-16 Keysight N5227B Service Guide...
Page 43 Average on/OFF softkey to toggle it ON. The Averaging Factor box will appear directly above the display. In the Averaging Factor box, type 50 or click the arrows to select 50, and then press ENTRY Enter Keysight N5227B Service Guide 3-17...
Page 44 Therefore, the measured deflection value must be divided in half to reach the correct value. Figure 3-7 Typical Cable Magnitude and Phase Stability Response 3-18 Keysight N5227B Service Guide...
Page 45 7. Disconnect and then reconnect the cable to the test port. Tighten the connection to the specified torque for the connector type. 8. Press RESPONSE , then Averaging Restart 9. Look at the trace for spikes or modes. Keysight N5227B Service Guide 3-19...
Page 46 Typical Cable Connector Repeatability Response If the Cable Connector Repeatability Check Fails 1. Clean the cable and devices, and torque to specification. Repeat the check. 2. If the check still fails, the cable should be repaired or replaced. 3-20 Keysight N5227B Service Guide...
Page 47: System Verification
Measurement Uncertainty Measurement uncertainty is defined as the sum of: — the residual systematic (repeatable) errors, and — the random (non-repeatable) errors in the measurement system after calibration. The systematic errors are: Keysight N5227B Service Guide 3-21...
Page 48: Measurement Traceability
This is accomplished by measuring the devices in an Keysight verification kit. The measurement of the devices in the verification kit has a traceable path...
Page 49: Performing System Verification
If you select to perform a calibration, you are guided through the calibration procedure. This part of the process can be eliminated if you Keysight N5227B Service Guide 3-23...
Page 50 Refer to the plots in the cable tests (earlier in this chapter) that show the performance of good cables. It is highly recommended that the test port cables be regularly tested. 3-24 Keysight N5227B Service Guide...
Page 51 Tests and Adjustments System Verification If the system verification is performed with a non-Keysight cable, ensure that the cable meets or exceeds the specifications for the test cable specified in the previous table, “Equipment Used in the System Verification Procedure.”...
Page 52 3-30. — File Tabular Data: Writes the tabular data to a text file in the Windows XP directory C:\Program Files\Keysight\Network Analyzer\Documents\ or in the Windows 7 directory C:\Users\Public\Public Documents\Network Analyzer\SysVer\. — File Graphs: Saves a screen image in PNG format in the Windows XP...
Page 53 Data selected in the Printer Output area of the System Verification dialog box. At the top of the printed output is the name of the device, the serial number of the device, and the date tested. Keysight N5227B Service Guide 3-27...
Page 54 Tests and Adjustments System Verification Each S-parameter measurement result is printed with frequency tested, lower and upper limit lines, the measured data, and the result of the test. Figure 3-12 Example of Printed Tabular Verification Results 3-28 Keysight N5227B Service Guide...
Page 55 — Data measured at the factory from the verification kit. Labeled as B in Figure 3-13. — Upper and lower limit points as defined by the total system uncertainty system. Labeled as C in Figure 3-13. Keysight N5227B Service Guide 3-29...
Page 56 Tests and Adjustments System Verification Figure 3-13 Example of Printed Graphical Verification Results 3-30 Keysight N5227B Service Guide...
Page 57: Performance Tests
1. The analyzer is Preset. 2. The analyzer is set up for a CW reflection measurement on the test port to be measured. 3. A power sensor is connected to the test port, using any necessary adapters. Keysight N5227B Service Guide 3-31...
Page 58: Source Maximum Power Output Test
+18 dBm without any error, the power is left at this level. 7. The power level at this point is measured and compared to the maximum output power specification. 3-32 Keysight N5227B Service Guide...
Page 59: Source Power Linearity Test
7. This power linearity measurement is repeated at several CW frequencies across the full frequency range of the analyzer. If the Analyzer Fails this Test: — Perform the “Source Adjustment” on page 3-47 and repeat this test. Keysight N5227B Service Guide 3-33...
Page 60: Frequency Accuracy Test
“10 MHz Frequency Reference Adjustment” on page 3-45 and then repeat this test. Trace Noise Test Function of the Test: To measure the stability of a signal in the internal source and receiver system of your analyzer. 3-34 Keysight N5227B Service Guide...
Page 61: Receiver Compression Test
Function of the Test: To measure the compression at the analyzer’s specified maximum power level for the receivers. Specification Tested: Test Port Input–Maximum Test Port Input Level Equipment Used: — U3070AK01 or Z5623A Option K01 Compression Test Set Keysight N5227B Service Guide 3-35...
Page 62 12.The first test set output attenuator is set to 0 dB. 13.The magnitude and phase measurements using the receiver under test are read: (Pd). 14.The compression for each point is calculated as (Pa–Pb) – (Pd–Pc). If the Analyzer Fails this Test: 3-36 Keysight N5227B Service Guide...
Page 63: Noise Floor Test
7. A CW linear measurement sweep is measured for each test point. The receiver reference power level, Pref, in dBm is calculated for each point from the mean of each sweep. 8. The test cable is removed and loads are connected to both ports. Keysight N5227B Service Guide 3-37...
Page 64: Calibration Coefficients Test
5. On some older analyzer models, the reflection tracking and transmission tracking error terms were also specified. For those models, these error terms are also retrieved from the analyzer. 6. This process is repeated for Ports 3 and 4 on 4-port analyzers. 3-38 Keysight N5227B Service Guide...
Page 65: Dynamic Accuracy Test
-17 dBm to -23 dBm at a rate of 2 Hz. 5. The analyzer’s receiver measurement is retrieved and compared with a perfect sine wave. Any deviation is due to receiver non-linearity. Keysight N5227B Service Guide 3-39...
Page 66: Dynamic Accuracy At Low Frequency (Available With Lfe Option 205/220/420/425)
Therefore a test set is not required. Specification Tested: Dynamic Accuracy at Low Frequency Equipment Used: — Function generator (33622A) — Power splitter (11667B) — Fixed attenuator (10dB x2) – (8493C Option 010) — Four test cables 3-40 Keysight N5227B Service Guide...
Page 67 — If the analyzer fails this test repeatedly, run the DC continuity test. Refer to “DC Continuity Test the LFE Board and Test Ports (Available with LFE Option 205/220/420/425)” on page 3-43 and to “Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board” on page 7-56. Keysight N5227B Service Guide 3-41...
Page 68 “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-39. — If the analyzer still fails this test, replace the A12 SPAM board and repeat this test. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-17. 3-42 Keysight N5227B Service Guide...
Page 69: Dc Continuity Test The Lfe Board And Test Ports (Available With Lfe Option 205/220/420/425)
“Top Assemblies and — Cables, All Options” on page 6-17 and the blue RF flexible cables installed in Chapter 6 in the "Bottom Assemblies" section—for your LFE option—are connected correctly and not open or shorted. Keysight N5227B Service Guide 3-43...
Page 70: Adjustments
“Calibration Procedure” below. Step 1. Verify your instrument is powered up. Step 2. Press Instrument > Display > Display Setup > Calibrate Touchscreen... Step 3. In the Table PC Setting window that opens, press Calibrate... 3-44 Keysight N5227B Service Guide...
Page 71: 10 Mhz Frequency Reference Adjustment
“Calibration Procedure” below. Step 1. Verify your instrument is powered up. Step 2. Press Instrument > Display > Display Setup > Calibrate Touchscreen... Step 3. In the Table PC Setting window that opens, press Calibrate... Keysight N5227B Service Guide 3-45...
Page 72 This adjustment typically adjusts to within ±0.01 ppm. 1. Connect the equipment as shown in Figure 3-15. Connect a GPIB cable between the network analyzer and the frequency counter. Figure 3-15 Equipment Setup for the 10 MHz Frequency Reference Adjustment 3-46 Keysight N5227B Service Guide...
Page 73: Synthesizer Bandwidth Adjustment
None Adapter, Type-N (f) to 2.4 mm (f) a. This sensor and adapter must be calibrated together by the Keysight factory. The data supplied is only valid as long as the sensor and adapter remain connected. b. The 1.85 mm connector has the same ruggedness and is compatible with the 2.4 mm connectors.
Page 74: If Gain Adjustment
Receiver Characterization This characterizes the receivers in your analyzer. Procedure Service Adjustment Routines 1. Press UTILITY , then , then , then System click Receiver Characterization. 2. Follow the instructions and prompts as they are displayed. 3-48 Keysight N5227B Service Guide...
Page 75: Receiver Adjustment
N4697E N4697-60200 a. This sensor and adapter must be calibrated together by the Keysight factory. The data supplied is only valid as long as the sensor and adapter remain connected. b. The 1.85 mm connector has the same ruggedness and is compatible with the 2.4 mm connectors.
Page 76 , then , then , then System click Receiver Adjustment. 3. Ensure the GPIB settings are correct. 4. Follow the instructions and prompts as they are displayed. Figure 3-18 Equipment Setup 2 for the Receiver Adjustment 3-50 Keysight N5227B Service Guide...
Page 77: Ee Default Adjustment
Procedure Service Adjustment Routines 1. Press UTILITY , then , then , then System click IF Response Adjustment. 2. Follow the instructions and prompts as they are displayed. Keysight N5227B Service Guide 3-51...
Page 78: Lfe Receiver Adjustment - (Available With Option 205, 220, 405, And 420)
Procedure Service Adjustment Routines 1. Press UTILITY System , then , then , then click LFE Receiver Adjustment. 2. Follow the instructions and prompts as they are displayed. 3-52 Keysight N5227B Service Guide...
Page 79: Troubleshooting
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series Service Guide Troubleshooting Information in This Chapter The information in this chapter helps you: — Identify the portion of the analyzer at fault. — Locate the specific troubleshooting procedure to identify the assembly or peripheral at fault.
Page 80: Chapter Four At-A-Glance
This represents a “tab”, whose label is determined by the instrument firmware. This represents a “softkey”, a key whose label is determined by the instrument Softkey firmware. Menu Item This represents an item in a drop-down or pop-up menu. Keysight N5227B Service Guide...
Page 81: Operating The Analyzer With Covers Removed
To reduce the chance of electrostatic discharge, follow all of the recommendations outlined in “Electrostatic Discharge Protection” on page 1-7, for all of the procedures in this chapter. Keysight N5227B Service Guide...
Page 82: Assembly Replacement Sequence
Step 2. Replace the faulty assembly and determine what adjustments are necessary. Refer to Chapter 7, “Repair and Replacement Procedures.” Step 3. Perform the necessary adjustments. Refer to Chapter 3, “Tests and Adjustments.” Step 4. Perform the necessary performance tests. Refer to Chapter 3, “Tests and Adjustments.” Keysight N5227B Service Guide...
Page 83: Getting Started With Troubleshooting
Check the Basics A problem can often be solved by repeating the procedure you were following when the problem occurred. Before calling Keysight Technologies or returning the instrument for service, please perform the following checks: 1. Is there power at the mains receptacle? If not, correct this situation and proceed.
Page 84 Troubleshooting Getting Started with Troubleshooting Figure 4-1 Troubleshooting Organization Flowchart Go to “Power Up Troubleshooting” Go to “Front Panel Troubleshooting” Go to “Rear Panel Troubleshooting” Go to “Measurement System Troubleshooting” Keysight N5227B Service Guide...
Page 85: Power Up Troubleshooting
“Troubleshooting LCD Display Problems” on page 4-13. — If the instrument appears to abort the network analyzer measurement interface process, contact Keysight. Refer to “Contacting Keysight” on page 2-6. Keysight N5227B Service Guide...
Page 86: Power Supply Check
ACOM as ground reference for analog supplies and the point marked DCOM as ground reference for digital supplies. Refer to Figure 4-2 for the power supply measurement points on the A19 midplane board. Refer to Table 4-2 on page 4-10 for the correct voltages. Keysight N5227B Service Guide...
Page 87 Failure to do so can result in personal injury or loss of life. Do not operate the analyzer with the outer cover removed for more than 30 minutes, as this could cause the analyzer to overheat which could result in costly damage. Keysight N5227B Service Guide...
Page 88 If the missing supply voltages return to a “power on” condition after removal of an assembly, suspect that assembly as being defective. Remove the network analyzer assemblies in the order specified in the following steps (refer to Chapter 7 for removal instructions). 4-10 Keysight N5227B Service Guide...
Page 89 To further isolate the failure in the three remaining assemblies, measure the resistance (with the power turned off) from the power supply test points to either ACOM or DCOM. Make sure that the only assemblies plugged in are the four minimum required assemblies listed above. Keysight N5227B Service Guide 4-11...
Page 90 A18 system motherboard. THIS MUST BE DONE QUICKLY AS THE ANALYZER WILL RAPIDLY OVERHEAT WITHOUT THE COOLING EFFECT OF THE FANS. DO NOT PLUG IN THE POWER CORD UNTIL READY TO PERFORM MEASUREMENTS. 4-12 Keysight N5227B Service Guide...
Page 91: Troubleshooting Lcd Display Problems
There are no front panel adjustments for intensity and contrast of the LCD. 1. If the display is dim, the A3 display assembly is defective. Refer to “Removing and Replacing the A1–A3 and Other Front Panel Subassemblies” on page 7-9. Keysight N5227B Service Guide 4-13...
Page 92 4. If the front panel interface ribbon cable is properly connected, suspect that one or more of the following is defective: — inverter board (mounted on the display assembly) — A1 front panel interface board — A3 display assembly 4-14 Keysight N5227B Service Guide...
Page 93: Front Panel Troubleshooting
Service Diagnostics Press UTILITY , then , then , then System Front Panel Test A Front Panel Key Test Utility dialog box will be displayed, as shown in Figure 4-4. Keysight N5227B Service Guide 4-15...
Page 94 7-10. To replace the A1 front panel interface board, refer to “Removing the A1 Front Panel Interface Board and Keypad Assembly” on page 7-9. — To close the Key Label window and return to the instrument display, press Preset three times. 4-16 Keysight N5227B Service Guide...
Page 95 Scale Save/Recall ← Math → Macro Avg BW Undo ↓ System Help Marker Search Preset a. There are no Entry or Navigation labels on the display. Entry and Navigation titles are for functional reference only. Keysight N5227B Service Guide 4-17...
Page 96: A3 Display Test
If the display is dark, refer to “Removing the A3 Display Assembly and the Touchscreen” on page 7-11 and to “Removing the Touchscreen Controller Board” on page 7-10. 4-18 Keysight N5227B Service Guide...
Page 97: Checking The A2 Usb Board
USB device. 3. If the device performs correctly, the USB board is functioning properly. Else, skip to step 5. 4. Repeat steps thru for all front and rear USB ports. Keysight N5227B Service Guide 4-19...
Page 98: A1 Front Panel Interface Board
A1 Front Panel Interface Board and Keypad Assembly” on page 7-9 and to “Removing the Speaker Assembly” on page 7-11. Checking the Operation of the Key Pad Commands To verify the key pad functionality, refer to “Front Panel Keypad and RPG Test” on page 4-15. 4-20 Keysight N5227B Service Guide...
Page 99 Troubleshooting Front Panel Troubleshooting Checking the Display To verify the display functionality, refer to “A3 Display Test” on page 4-18. Keysight N5227B Service Guide 4-21...
Page 100: Rear Panel Troubleshooting
, then Configure , then SICL/GPIB... SICL/GPIB/SCPI dialog box is displayed. 3. In the GPIB block, click System Controller to establish the analyzer as a controller. Wait for the analyzer to configure, and then click OK. 4-22 Keysight N5227B Service Guide...
Page 101: Lan Troubleshooting
Problems with the Local Area Network (LAN) can be difficult to solve. Software and protocol problems can make it difficult to determine whether the analyzer's hardware is working properly, or if there is a problem with the LAN or cabling. Keysight N5227B Service Guide 4-23...
Page 102 Windows Taskbar menu at the bottom of the display. b. On the Windows Taskbar menu, click Start, point to Programs, Accessories, and then click Command Prompt. c. The command prompt window is displayed. 4-24 Keysight N5227B Service Guide...
Page 103 . Then press ENTRY Enter on the front 1. The letters x represent the IP address of the other device on the network. 2. The letters x represent the IP address of the analyzer. Keysight N5227B Service Guide 4-25...
Page 104 If possible, eliminate the possibility of a defective analyzer by substitution of a known working unit. Once the analyzer has been proven to be working properly, concentration can be placed on the network itself to determine the cause of the failure. 4-26 Keysight N5227B Service Guide...
Page 105 2 on the other end of the cable. 3. Insulate all exposed wires so that they cannot short together. 4. Label this as a crossover cable so that it cannot be confused with a standard cable. Keysight N5227B Service Guide 4-27...
Page 106 Troubleshooting Rear Panel Troubleshooting Figure 4-6 Construction of a Crossover Cable 4-28 Keysight N5227B Service Guide...
Page 107: Measurement System Troubleshooting
, then Help . Verify that the information displayed in this screen is correct for About NA... your analyzer. If any of the information is incorrect, contact Keysight Technologies. Refer to “Contacting Keysight” on page 2-6. Keysight N5227B Service Guide...
Page 108: Verifying The A, B, C, D, And R Traces (Standard S-Parameter Mode)
, then System View EEPROM Headers . Refer to Figure 4-7. If the information is incorrect for any of the PC boards, contact Keysight Technologies. Refer to “Contacting Keysight” on page 2-6. Figure 4-7 EEPROM Header Info Dialog Window Error Messages SOURCE UNLEVELED: The source ALC circuit on the A23 test set motherboard is running open-loop.
Page 109 — For 4-port analyzer models, traces A, B, C, D, and R1, R2, R3, and R4 are displayed in eight separate data windows as shown in Figure 4-9. Identifying discrepancies of the traces in these windows can help you to isolate the faulty assembly. Keysight N5227B Service Guide 4-31...
Page 110: Where To Begin Troubleshooting
— Go to Chapter 3, “Tests and Adjustments.” and perform all the tests in that section. — If a problem still exists, contact Keysight. Refer to “Contacting Keysight” on page 2-6. — If any of the traces are not present, are noisy or distorted, or are at an incorrect level, then there is a problem with the analyzer’s measurement...
Page 111 — If all traces are missing in all bands, the problem is most likely in the source group. However, a missing or disabled DSP driver may exhibit the same or similar symptoms. To verify that this DSP driver is present and enabled: Keysight N5227B Service Guide 4-33...
Page 112 Network Adapters in the resulting list. The following entry should be listed: Keysight Technologies DSP Driver #2 and should be enabled. 2. If the entry is not present or if the icon to the left of the name is a...
Page 113: Checking The Source Group
Equipment Used for This Check Equipment Type Model or Alternate Model or Part Number Part Number Power meter E4418B/E4419B E4418A/E4419A Power sensor, 2.4 mm E8487A None Adapter, 2.4 mm (f) to 2.4 mm (f) 11900B 85056-60007 Keysight N5227B Service Guide 4-35...
Page 114 A15 LO synthesizer board. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-17. 7. If the signal is present, reconnect cable W41, and then continue with “Checking the A25 HMA26.5 Output”. 4-36 Keysight N5227B Service Guide...
Page 115 5. If the observed problem was frequency banded rather than broadband related, set the analyzer frequency to the center of the problem band. The spectrum analyzer should measure a signal above the network analyzer Keysight N5227B Service Guide 4-37...
Page 116 (W7, W8, and A10 are only available in 4-port models and 2-port models with Option 224.) 2. Disconnect cables W3 and W4 or cables W7 and W8, dependent on which source board is to be checked, at the A7, A8, A12, or A13 40 GHz Doubler board. 4-38 Keysight N5227B Service Guide...
Page 117 Refer to “Removing and Replacing the A4–A17 Boards” on page 7-17. 7. If the signal is present, reconnect all cables, and then continue with “Checking the Signal Separation Group” on page 4-41. Keysight N5227B Service Guide 4-39...
Page 118 Checking the A70/A75 Low Frequency Extension (LFE) Board and the Bias Combiners The 2-port and 4-port Low Frequency Extension (LFE) options add additional hardware to extend the start frequency of the VNA down to 900 Hz. 4-40 Keysight N5227B Service Guide...
Page 119: Checking The Signal Separation Group
“Removing the Covers” on page 7-6. Procedures described in this document are performed with power supplied to the product while protective covers are removed. Energy available at many points may, if contacted, result in personal injury. Keysight N5227B Service Guide 4-41...
Page 120 1. Connect the power sensor to the suspect port. 2. Set the trace to measure S , or S , dependent on the suspect port. 3. Observe the power reading on the power meter as the sweep occurs on the analyzer. 4-42 Keysight N5227B Service Guide...
Page 121: 2-Port Configuration, Option 210
Set the network analyzer for an S or S measurement for Port 1, 2, 3, or 4 respectively, with a CW frequency of 800 MHz. Keysight N5227B Service Guide 4-43...
Page 122 Checking the A38, A39, A40, and A41 60-dB Source Step Attenuators 1. Locate the appropriate semirigid cable at the output of the source step attenuator to be checked: — Options 219, 224, 419, and 423 4-44 Keysight N5227B Service Guide...
Page 123 “Removing and Replacing the A29 –A32 Receiver Couplers and Receiver Coupler Mounting Brackets” on page 7-41. Checking the A70–A74 Bias Combiners Refer to “Checking the A70/A75 Low Frequency Extension (LFE) Board and the Bias Combiners” on page 4-40. Keysight N5227B Service Guide 4-45...
Page 124: Checking The Receiver Group
Use an antistatic work surface and wrist strap to reduce the chance of electrostatic discharge for all of the procedures in this chapter. 1. Turn off the analyzer power. 2. Unplug the power to the analyzer and disconnect all front and rear panel connections except installed jumpers. 4-46 Keysight N5227B Service Guide...
Page 125 4. Refer to the Note on page 4-29. The measured signal on the spectrum analyzer should be at 7.61 MHz (analyzers with DSP version 4.0), or 7.44 MHz (analyzers with DSP version 5.0), and 1 GHz. Keysight N5227B Service Guide 4-47...
Page 126 A46–A49 Receiver Attenuators” on page 7-47. 5. If the 800 MHz signal is present, replace the associated mixer brick, A27 or A28. Refer to “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-39. 4-48 Keysight N5227B Service Guide...
Page 127 “Removing and Replacing the A4–A17 Boards” on page 7-17. 6. If the measured signal is not present, replace the A24 IF multiplexer board. Refer to “Removing and Replacing the A24 IF Multiplexer Board” on page 7-33. Keysight N5227B Service Guide 4-49...
Page 128: Instrument Simplified Block Diagrams - Lfe
2-Port N5290A System Block Diagram (201 and 205) Figure 4-11 System Block Diagram Legend Figure 4-12 2-Port N5290A System Simplified Block Diagram (201 and 205) 1. Your model PNA may not have available all of the LFE Options listed. 4-50 Keysight N5227B Service Guide...
Page 129: 2-Port N5290A System Block Diagram (202 And 205)
Troubleshooting Instrument Simplified Block Diagrams – LFE 2-Port N5290A System Block Diagram (202 and 205) Figure 4-13 2-Port N5290A System Simplified Block Diagram (202 and 205) Keysight N5227B Service Guide 4-51...
Page 130: 4-Port N5290A System Block Diagram (401)
Troubleshooting Instrument Simplified Block Diagrams – LFE 4-Port N5290A System Block Diagram (401) Figure 4-14 4-Port N5290A System Simplified Block Diagram (401) 4-52 Keysight N5227B Service Guide...
Page 131 Troubleshooting Instrument Simplified Block Diagrams – LFE Figure 4-15 4-Port N5290A System Simplified Block Diagram (402) Keysight N5227B Service Guide 4-53...
Page 132 Troubleshooting Instrument Simplified Block Diagrams – LFE Figure 4-16 4-Port N5290A System Simplified Block Diagram (403) 4-54 Keysight N5227B Service Guide...
Page 133: Instrument Block Diagrams Sheet 1
Troubleshooting Instrument Block Diagrams Sheet 1 Instrument Block Diagrams Sheet 1 Microwave PNA, N5227B Keysight N5227B Service Guide 4-55...
Page 134 N5227B 2-Port Overall Block Diagram (Includes Options 200-Standard; 201-Configurable Test Set; and 219-Attenuators and DISPLAY USB BD Bias Tees) Service Guide: N5227-90026 A24 IF MULTIPLEXER A16 SIGNAL PROCESSING IF = 0.826 MHz for CW Freq < 53 MHz IF = 7.438 MHz for CW Freq > 53 MHz...
Page 135: Instrument Block Diagrams Sheet 2
Troubleshooting Instrument Block Diagrams Sheet 2 Instrument Block Diagrams Sheet 2 Microwave PNA, N5227B Keysight N5227B Service Guide 4-57...
Page 136 N5227B 4-Port Overall Block Diagram (Includes Options 400-Standard;401-Configurable Test Set; and 419-Attenuators and Bias Tees) DISPLAY USB BD Service Guide: N5227-90026 A24 IF MULTIPLEXER A16 SIGNAL PROCESSING IF = 0.826 MHz for CW Freq < 53 MHz IF = 7.438 MHz for CW Freq > 53 MHz...
Page 137: Theory Of Operation
Information in This Chapter This chapter provides a general description of the operating theory of the N5227B 2-port and 4-port PNA microwave network analyzers. — Theory of operation is explained to the assembly level only. — Component-level circuit theory is not provided.
Page 138: Network Analyzer System Operation
These IF signals are downconverted and then sampled and digitally processed. Figure 5-1 is a simplified block diagram of the 4-port network analyzer system Figure 5-2 is a simplified block diagram of the 2-port network analyzer system. Figure 5-1 4-Port System Simplified Block Diagram Keysight N5227B Service Guide...
Page 139 Theory of Operation Network Analyzer System Operation Figure 5-2 2-Port System Simplified Block Diagram Keysight N5227B Service Guide...
Page 140 Theory of Operation Network Analyzer System Operation Figure 5-3 System Block Diagram Legend – LFE Block Diagrams Figure 5-4 4-Port N5290A System Simplified Block Diagram (401) – with LFE Keysight N5227B Service Guide...
Page 141: Functional Groups Of The Network Analyzer
The major functional groups are: — Synthesized Source Group — Signal Separation Group — Receiver Group — Digital Processor and Digital Control Group — Power Supply Group Keysight N5227B Service Guide...
Page 142 The built-in synthesized source generates a swept, stepped, or continuous wave (CW) signal in the frequency ranges as listed in the Data Sheet and Technical Specifications documents, available online at: www.keysight.com. The source group provides five signals: an LO signal and four incident signals.
Page 143 “Digital Processing and Digital Control Group Operation” on page 5-42. Power Supply Group The power supply functional group provides power for the other assemblies in the instrument. Refer to “Power Supply Group Operation” on page 5-47. Keysight N5227B Service Guide...
Page 144: Synthesized Source Group Operation
53 MHz when the IF is 0.826 MHz. This IF signal is sent to the A16 SPAM board for digital processing. 1. For frequency ranges and maximum output power levels, refer to the section “Test Port Output” in the Data Sheet and Technical Specifications documents (see hyperlinks above). Keysight N5227B Service Guide...
Page 145 7.438 MHz higher than the test signal. Since the A4, A15, and A17 13.5 GHz synthesizer boards each receive their 50 MHz input reference signal from the exact same source, frequency drift error is eliminated. Figure 5-6 Source Group, Part 1 Keysight N5227B Service Guide...
Page 146 Theory of Operation Synthesized Source Group Operation Figure 5-7 Source Group, Part 2 5-10 Keysight N5227B Service Guide...
Page 147 0.50761 to 0.50761 to 0.500 to 0.500 to 0.500 to 0.500 to 0.63561 0.63561 0.628 0.628 0.628 0.628 0.63561 to 0.63561 to 0.628 to 0.628 to 0.628 to 0.628 to 1.00761 1.00761 1.000 1.000 1.000 1.000 Keysight N5227B Service Guide 5-11...
Page 148 6.75880 to 13.51761 to 6.755 to 13.510 to 13.510 to 13.510 to 7.70380 15.40761 7.700 15.400 15.400 15.400 7.70380 to 15.40761 to 7.700 to 15.400 to 15.400 to 15.400 to 8.00380 16.00761 8.000 16.000 16.000 16.000 5-12 Keysight N5227B Service Guide...
Page 149 8.3346 to 16.6692 to 12.500 to 12.500 to 25.000 to 50.000 to 9.0039 18.0079 13.504 13.504 27.008 54.016 9.0039 to 18.0079 to 6.752 to 13.504 to 27.008 to 54.016 to 10.0013 20.0025 7.500 15.000 30.000 60.000 Keysight N5227B Service Guide 5-13...
Page 150: A4, A15, And A17 13.5 Ghz Synthesizer Boards
(the source synthesizers). This is because the output of the A15 13.5 GHz synthesizer board is routed through the A25 LO multiplier/amplifier 26.5 board to the A27 and A28 mixer bricks where they are mixed with the test signals to 5-14 Keysight N5227B Service Guide...
Page 151: A5 And A10 26.5 Ghz Source Boards
This output is terminated with a 50-ohm load on the A8, A12, and A13 doubler boards. The companion signal, EXT TEST SET DRIVE LO, is output from the A27 mixer brick. Refer to “A27 and A28 Mixer Bricks” on page 5-37. Keysight N5227B Service Guide 5-15...
Page 152: A56, A57, A58, And A59 70 Ghz Doubler Boards
10 MHz REF OUTPUT A BNC connector that allows a 10 MHz reference signal, produced by the A14 frequency reference board, to be output for use in phase locking external test equipment. 5-16 Keysight N5227B Service Guide...
Page 153: A23 Test Set Motherboard
TTL out, test set select bit 0, tied to 0 V Sweep Holdoff In TTL in, low level holds off sweep 3–6 AD12–AD8 TTL I/O, address and latched data 0 V, ground reference TTL out, active low address strobe (1 μs min) Keysight N5227B Service Guide 5-17...
Page 154 TTL in, negative pulse (1 μs min) latches OUTPUT1-2 3–4 OUTPUT1–2 TTL out, latched 5–12 Port A0–7 Out TTL out, latched 13–20 Port B0–7 Out TTL out, latched 21–24 Port C I/O TTL I/O, latched 25–28 Port D I/O TTL I/O, latched 5-18 Keysight N5227B Service Guide...
Page 155 Programmable ±10 V @ 100 mA out Nominally 0 ohms 2.44 mV typical resolution 1 MHz BW AnalogOut2 Analog Output Voltage Programmable ±10 V @ 100 mA out Nominally 0 ohms 2.44 mV typical resolution 1 MHz BW Keysight N5227B Service Guide 5-19...
Page 156: A70 4-Port And A75 2-Port Low Frequency Extension (Lfe) Board
900 Hz. And, the high end of the LFE board is 100 MHz. Between 10 MHz and 100 MHz either LFE or non-LFE mode can be used. The inputs and outputs connectors of the LFE board: PNA 2 ports: Inputs: 5-20 Keysight N5227B Service Guide...
Page 157 — LF output J5, Port 4, to be connected to the bias combiner Port 4. — 5 IF outputs J7, J11, J12, J13, J14, to be connected to the A24 IF MUX board: A, B, C, D and R. Keysight N5227B Service Guide 5-21...
Page 158 Theory of Operation Synthesized Source Group Operation Figure 5-8 Block Diagram with Synthesizer Board and LFE Board Synthesizer Bias combiner 5-22 Keysight N5227B Service Guide...
Page 159 Theory of Operation Synthesized Source Group Operation Figure 5-9 2-Port with LFE Synthesizer Bias combiners Figure 5-10 4-Port with LFE Synthesizer Synthesizer Bias combiners Keysight N5227B Service Guide 5-23...
Page 160 Theory of Operation Synthesized Source Group Operation Figure 5-11 2-Port LFE with IF MUX Board Bias combiners Figure 5-12 4-Port LFE with IF MUX Board Bias combiners 5-24 Keysight N5227B Service Guide...
Page 161 0.24414 0.24414 to 2,000 to 4,000 2048 8192 0.24414 to 0.48828 0.48828 0.48828 to 2,000 to 4,000 1024 4096 0.48828 to 0.97656 0.97656 1. Some of the LFE options are not available on all models. Keysight N5227B Service Guide 5-25...
Page 162 1.99000 to 2.000 to 4.000 15.62500 to 31.25000 31.25000 31.5000 to 2.000 to 4.000 31.25000 to 53.0000 62.50000 53.0000 to 2.000 to 4.000 31.25000 to 62.50000 62.50000 62.50000 to 2.000 to 4.000 62.50000 to 1000.0000 125.0000 5-26 Keysight N5227B Service Guide...
Page 163 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 1. Some of the LFE options are not available on all models. Keysight N5227B Service Guide 5-27...
Page 164 RF signals in LFE mode and create dedicated IF signals. These IF signals are then sent to the IF Mux board. On the IF MUX board, the configuration between the Main IF signals and LFE IF signals are very different. 5-28 Keysight N5227B Service Guide...
Page 165 Figure 5-13 on page 5-29 shows the new structure of the frequency bands with the LFE option. The two receiver modes, mixer and direct conversion, are used in different frequency bands. Figure 5-13 Frequency Bands Without LFE Keysight N5227B Service Guide 5-29...
Page 166 Theory of Operation Synthesized Source Group Operation Figure 5-14 Frequency Bands with LFE 5-30 Keysight N5227B Service Guide...
Page 167: Signal Separation Group Operation
— the A29 port 1 receiver coupler and the A33 test port 1 coupler — the A30 port 3 receiver coupler and the A34 test port 3 coupler — the A31 port 4 receiver coupler and the A35 test port 4 coupler Keysight N5227B Service Guide 5-31...
Page 168: A29-A32 Receiver Couplers
The coupled arm of the couplers carries the signal reflected from or transmitted through the DUT, to the receiver for measurement (through front panel jumpers), as inputs A, B, C, and D for 4-port models or inputs A and B for 5-32 Keysight N5227B Service Guide...
Page 169 Theory of Operation Signal Separation Group Operation 2-port models. The coupling coefficient of the directional couplers is nominally 15 dB for all frequencies above 500 MHz. The coupling coefficient increases for frequencies below 500 MHz. Keysight N5227B Service Guide 5-33...
Page 170 Theory of Operation Signal Separation Group Operation Figure 5-15 4-Port Signal Separation Group 5-34 Keysight N5227B Service Guide...
Page 171 Theory of Operation Signal Separation Group Operation Figure 5-16 2-Port Signal Separation Group Keysight N5227B Service Guide 5-35...
Page 172: A38-A41 60-Db Source Step Attenuators And A471-A45 Bias Tees (Optional)
The bias tee combiners are to provide DC biasing for the DUT via the N5292A PNA Millimeter Test Set and millimeter heads. Refer to www.keysight.com/find/pna. See also, “A70 4-Port and A75 2-Port Low Frequency Extension (LFE) Board” on page 5-20. 5-36 Keysight N5227B Service Guide...
Page 173: Receiver Group Operation
For frequencies at or above 53 MHz, the test signals (receivers A, B, C, and D for 4-port models and A and B for 2-port models) and the reference signals (receivers R1, R2, R3, and R4 for 4-port models and R1 and R2 for 2-port Keysight N5227B Service Guide 5-37...
Page 174: A24 If Multiplexer Board
IFGateAin IF pulse gate input A (TTL) IFGateBin IF pulse gate input B (TTL) IFGateCin IF pulse gate input C (TTL) IFGateDin IF pulse gate input D (TTL) IFGateRin IF pulse gate input R (TTL) 5-38 Keysight N5227B Service Guide...
Page 175: A16 Spam Board (Analog Description)
The processed and formatted data is finally routed to the display, and to the general-purpose interface bus (GPIB) for remote operation. Refer to “Digital Processing and Digital Control Group Operation” on page 5-42 for more information on signal processing. Keysight N5227B Service Guide 5-39...
Page 176 Theory of Operation Receiver Group Operation Figure 5-17 4-Port Receiver Group 5-40 Keysight N5227B Service Guide...
Page 177 Theory of Operation Receiver Group Operation Figure 5-18 2-Port Receiver Group Keysight N5227B Service Guide 5-41...
Page 178: Digital Processing And Digital Control Group Operation
A2 USB Board — A3 Display Assembly — Keypad Assembly — A18 System Motherboard — Data Acquisition and Processing Subgroup — A16 SPAM Board (Digital Description) — A21 CPU Board — A55 Solid State Drive (SSD) 5-42 Keysight N5227B Service Guide...
Page 179 Theory of Operation Digital Processing and Digital Control Group Operation Figure 5-19 Digital Processing and Digital Control Group Keysight N5227B Service Guide 5-43...
Page 180: Front Panel Subgroup
The video data received from the A21 CPU board includes the following: • digital TTL horizontal sync • digital TTL red video • blanking • digital TTL vertical sync • digital TTL green video • data clock • digital TTL blue video 5-44 Keysight N5227B Service Guide...
Page 181: Data Acquisition And Processing Subgroup
In addition, when the analyzer is in the system controller mode, the CPU controls peripheral devices through the peripheral port interfaces. Front panel settings are stored in SRAM, with a battery providing at least five years of backup storage when external power is off. Keysight N5227B Service Guide 5-45...
Page 182 The SSD is a Serial Advanced Technology Attachment (SATA) data storage device which is connected directly to, and physically mounted within the enclosure of, the A21 CPU board. The full operating system and firmware for the network analyzer is stored on the A55 SSD. 5-46 Keysight N5227B Service Guide...
Page 183: Power Supply Group Operation
The +15 V standby supply remains on continuously whenever the power supply is plugged in. This supply is used to provide power to front panel LEDs and CPU components when the analyzer is turned off. Keysight N5227B Service Guide 5-47...
Page 184 Theory of Operation Power Supply Group Operation 5-48 Keysight N5227B Service Guide...
Page 185: Replaceable Parts
Service Guide Replaceable Parts Information in This Chapter This chapter: — identifies the replaceable parts for the Keysight PNA series microwave network analyzer. — includes several tables and illustrations to assist you in identifying the correct part for your analyzer.
Page 186: Ordering Information
Ordering Information To order a part listed in the replaceable parts lists: — include the part number — indicate the quantity required — Contact Keysight Technologies for instructions on where to send the order. Refer to “Contacting Keysight” on page 2-6.
Page 187: Assembly Replacement Sequence
Adjustments.” Step 5. Perform the necessary performance tests. Refer to Chapter 3, “Tests and Adjustments.” Step 6. Keysight personnel: see Figure 1-1 on page 1-6 to review where the calibration stickers should be placed on the PNA. Keysight N5227B Service Guide...
Page 188: Rebuilt-Exchange Assemblies
— The defective assembly must be returned for credit under the terms of the rebuilt-exchange assembly program. — Spare assembly stock desired should be ordered using the new assembly part number. Keysight N5227B Service Guide...
Page 189 Replaceable Parts Rebuilt-Exchange Assemblies Figure 6-1 Module Exchange Procedure Keysight N5227B Service Guide...
Page 190: Replaceable Parts Listings
Replaceable Parts Replaceable Parts Listings Replaceable Parts Listings This section contains the replacement part numbers and their descriptions for your Keysight microwave PNA. You can find the locations of replaceable parts in this section: — listed by reference designator in Table 6-1, or —...
Page 191 Port 2 bias tee Port 1 receiver step attenuator Port 3 receiver step attenuator Port 4 receiver step attenuator Port 2 receiver step attenuator solid state drive “Top Assemblies and Cables, All Options” on page 6-17. Keysight N5227B Service Guide...
Page 192 REF 1 RCVR R1 IN 3-dB attenuator REF 4 RCVR R4 IN 3-dB attenuator LFE board - 4-Port LFE board - 2-Port Port 1 bias combiner Port 3 bias combiner Port 4 bias combiner Port 2 bias combiner Keysight N5227B Service Guide...
Page 193 “Top Hardware and Miscellaneous Parts, All Options” on page 6-122 — “Bottom Hardware and Miscellaneous Parts” on page 6-124 — “Internal Hardware and Miscellaneous Parts, All Options” on page 6-127 — “External Hardware and Miscellaneous Parts, All Options” on page 6-129 Miscellaneous Keysight N5227B Service Guide...
Page 194 Battery on page 6-131 — Protective Guards for Front Panel Jumpers on page 6-131 — USB Accessories on page 6-132 — ESD Supplies on page 6-132 — Rack Mount Kits and Handle Kits on page 6-132 6-10 Keysight N5227B Service Guide...
Page 195: Front Panel Assembly, Front Side, All Options
N5240-40002 Trim, bottom, goes on the outside, underneath the Front Frame frame ( (All PNA models) ➉ 0515-1946 Machine screw, M3 x 6 mm flat head (To attach lower dress panel overlay frame to chassis.) Keysight N5227B Service Guide 6-11...
Page 196 Not Shown N5242-00048 Guard, jumper cables, side—2-Port & 4-Port Not Shown N5242-00049 Guard, jumper cables, center—4-Port Not shown 5023-3074 Front handle a. Some options require 14 of the 0515-1946 screws to secure dress panel overlay subpanel. 6-12 Keysight N5227B Service Guide...
Page 197 Replaceable Parts Replaceable Parts Listings Figure 6-2 Front Panel Assembly, Front Side, All Options Keysight N5227B Service Guide 6-13...
Page 198: Front Panel Assembly, Back Side, All Options
Power switch board (PCA for Power button keypad) N5242-40014 Power button keypad Display assembly N9912-20043 Tape (To secure cable E5071-61653 to 2090-1092 LCD’s connector and to secure cable E5071-61653 to J8 on the interface board) 6-14 Keysight N5227B Service Guide...
Page 199 Cable, A3 LED Driver board (Backlight converter board) to interface board N5242-60074 Power switch cable E5071-61660 Wire assembly, RPG (to attach RPG board (N5240-60083) to Interface board (J10) Figure 6-3 Front Panel Assembly, Back Side, All Options Keysight N5227B Service Guide 6-15...
Page 200 Replaceable Parts Replaceable Parts Listings Figure 6-4 A3 Display Assembly with Interface Board/USB Assemblies Figure 6-5 A3 Display Assembly with LCD Display 2090-1092 (LED) and Side Brackets 6-16 Keysight N5227B Service Guide...
Page 201: Top Assemblies And Cables, All Options
1420-0356 Battery, lithium manganese dioxide, 3V, 0.22A-hr. a. For the latest information on CPUs and associated drives, visit na.support.keysight.com/pna/hdnumbers.html. b. The A55 solid state disk drive is located inside the A21 CPU board assembly. Refer to “Removing and Replacing the A55 Solid State Drive (SSD)”...
Page 202 For more information on the N8985A SSD, refer to the Windows 10 Operating System Upgrade Kit Installation Note, available online at http://literature.cdn.keysight.com/litweb/pdf/N8985-90001.pdf e. The lithium battery is located inside the A21 CPU board assembly. Refer to “Removing and Replacing the for an illustration. Lithium Battery” on page 7-72 6-18 Keysight N5227B Service Guide...
Page 203 Replaceable Parts Replaceable Parts Listings Figure 6-6 Top Assemblies, All Options Keysight N5227B Service Guide 6-19...
Page 204 A14 frequency reference board J4 to A16 SPAM board J3 N5242-60028 A14 freq ref bd J5 to btm of A15 13.5 GHz LO synth bd J5 N5242-60029 A14 freq ref bd J6 to btm of A4 13.5 GHz source 1 synth bd J5 6-20 Keysight N5227B Service Guide...
Page 205 A70 Cable, assy RF CA, LFE SRC2 J21 - Synth SRC2 J102 W193 N5242-60080 A70/A75 Cable, assy RF CA, LFE LO J18 - Synth LO J102 ➀ 1250-4261 Termination, 50-ohm load Was: 1810-0118 a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5227B Service Guide 6-21...
Page 206 Replaceable Parts Replaceable Parts Listings Figure 6-7 Top Cables, All Cables—All Options 6-22 Keysight N5227B Service Guide...
Page 207: 2-Port Configuration, Option 200
All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5227B Service Guide 6-23...
Page 208 Replaceable Parts Replaceable Parts Listings Figure 6-8 Bottom Assemblies, Standard 2-Port Configuration, Option 200 6-24 Keysight N5227B Service Guide...
Page 209 A32 port 2 receiver coupler to A36 port 2 coupler W135 N5227-20007 A33 port 1 coupler to A27 mixer brick (A) W138 N5227-20008 A36 port 2 coupler to A27 mixer brick (B) a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5227B Service Guide 6-25...
Page 210 Replaceable Parts Replaceable Parts Listings Figure 6-9 Bottom RF Cables, Standard 2-Port Configuration, Option 200 6-26 Keysight N5227B Service Guide...
Page 211 Rear-panel HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5227B Service Guide 6-27...
Page 212 Replaceable Parts Replaceable Parts Listings Figure 6-10 Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 200 6-28 Keysight N5227B Service Guide...
Page 213: 2-Port Configuration, Option 201
All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5227B Service Guide 6-29...
Page 214 Replaceable Parts Replaceable Parts Listings Figure 6-11 Bottom Assemblies, Option 201 6-30 Keysight N5227B Service Guide...
Page 215 A27 mixer brick (A) to A24 IF multiplexer (P1) N5242-60025 A27 mixer brick (R1) to A24 IF multiplexer (P601) N5242-60026 A27 mixer brick (R2) to A24 IF multiplexer (P801) N5242-60018 A27 mixer brick (B) to A24 IF multiplexer (P201) Keysight N5227B Service Guide 6-31...
Page 216 Replaceable Parts Listings Reference Part Number Description Type Designator W79 - 83, Refer to “Top Cables, All Cables—All Options” on page 6-20. W91- 92, W97- 98 a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-32 Keysight N5227B Service Guide...
Page 217 Replaceable Parts Replaceable Parts Listings Figure 6-12 Bottom RF Cables, Option 201 Keysight N5227B Service Guide 6-33...
Page 218 Rear-panel HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-34 Keysight N5227B Service Guide...
Page 219 Replaceable Parts Replaceable Parts Listings Figure 6-13 Bottom Ribbon Cables and Wire Harnesses, Option 201 Keysight N5227B Service Guide 6-35...
Page 220 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-36 Keysight N5227B Service Guide...
Page 221 Replaceable Parts Replaceable Parts Listings Figure 6-14 Bottom Assemblies, Option 20 Keysight N5227B Service Guide 6-37...
Page 222 A27 mixer brick (R2) to A24 IF multiplexer (P801) N5242-60018 A27 mixer brick (B) to A24 IF multiplexer (P201) W79 - 83, Refer to “Top Cables, All Cables—All Options” on page 6-20. W91- 92, W97- 98 6-38 Keysight N5227B Service Guide...
Page 223 Cable, assembly, RF, Front panel coupler to A71 Bias-T port 1 W199 N5247-20168 Cable, assembly, RF, Front panel coupler to A74 bias-T port 2 a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5227B Service Guide 6-39...
Page 224 Replaceable Parts Replaceable Parts Listings Figure 6-15 Bottom RF Cables, Option 205 6-40 Keysight N5227B Service Guide...
Page 225 A23 test set motherboard J541 to A71 port 1 bias tee combiner P/O Bias A23 test set motherboard J544 to A74 port 2 bias tee combiner Combiner a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5227B Service Guide 6-41...
Page 226 Replaceable Parts Replaceable Parts Listings Figure 6-16 Bottom Ribbon Cables and Wire Harnesses, Option 205 6-42 Keysight N5227B Service Guide...
Page 227 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5227B Service Guide 6-43...
Page 228 Replaceable Parts Replaceable Parts Listings Figure 6-17 Bottom Assemblies, Option 210 6-44 Keysight N5227B Service Guide...
Page 229 W139 N5227-20024 A29 port 1 receiver coupler to A33 port 1 coupler W145 N5227-20023 A32 port 2 receiver coupler to A36 port 2 coupler a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5227B Service Guide 6-45...
Page 230 Replaceable Parts Replaceable Parts Listings Figure 6-18 Bottom RF Cables, Option 210 6-46 Keysight N5227B Service Guide...
Page 231 Rear-panel HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5227B Service Guide 6-47...
Page 232 Replaceable Parts Replaceable Parts Listings Figure 6-19 Bottom Ribbon Cables and Wire Harnesses, Option 210 6-48 Keysight N5227B Service Guide...
Page 233 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5227B Service Guide 6-49...
Page 234 Replaceable Parts Replaceable Parts Listings Figure 6-20 Bottom Assemblies, Option 219 6-50 Keysight N5227B Service Guide...
Page 235 A38 port 1 source attenuator to front-panel port 1 SOURCE OUT W103 N5247-20081 Front-panel port 1 CPLR THRU to A42 port 1 bias tee W104 N5247-20040 A33 port 1 coupler to A42 port 1 bias tee Keysight N5227B Service Guide 6-51...
Page 236 N5247-20020 Port 2 RCVR B IN to A49 port 2 receiver attenuator W124 N5247-20046 A49 port 2 receiver attenuator to A27 mixer brick (B) a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-52 Keysight N5227B Service Guide...
Page 237 Replaceable Parts Replaceable Parts Listings Figure 6-21 Bottom RF Cables, Option 219 Keysight N5227B Service Guide 6-53...
Page 238 Rear-panel HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-54 Keysight N5227B Service Guide...
Page 239 Replaceable Parts Replaceable Parts Listings Figure 6-22 Bottom Ribbon Cables and Wire Harnesses, Option 219 Keysight N5227B Service Guide 6-55...
Page 240 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-56 Keysight N5227B Service Guide...
Page 241 Replaceable Parts Replaceable Parts Listings Figure 6-23 Bottom Assemblies, Option 220 Keysight N5227B Service Guide 6-57...
Page 242 A38 port 1 source attenuator to front-panel port 1 SOURCE OUT W113 N5247-20083 A32 port 2 receiver coupler to A41 port 2 source attenuator W114 N5247-20034 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT 6-58 Keysight N5227B Service Guide...
Page 243 Cable, assembly, RF, Front panel coupler to A71 bias-T port 1 W199 N5247-20168 Cable, assembly, RF, Front panel coupler to A74 bias-T port 2 a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5227B Service Guide 6-59...
Page 244 Replaceable Parts Replaceable Parts Listings Figure 6-24 Bottom RF Cables, Option 220 6-60 Keysight N5227B Service Guide...
Page 245 Rear-panel HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5227B Service Guide 6-61...
Page 246 Replaceable Parts Replaceable Parts Listings Figure 6-25 Bottom Ribbon Cables and Wire Harnesses, Option 220 6-62 Keysight N5227B Service Guide...
Page 247: 4-Port Configuration, Option 401
All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5227B Service Guide 6-63...
Page 248 Replaceable Parts Replaceable Parts Listings Figure 6-26 Bottom Assemblies, Standard 4-Port Configuration, Option 400 6-64 Keysight N5227B Service Guide...
Page 249 A28 mixer brick (D) to A24 IF multiplexer (P801) N5242-60019 A28 mixer brick (R4) to A24 IF multiplexer (P414) N5242-60020 A28 mixer brick (R3) to A24 IF multiplexer (P413) N5242-60023 A28 mixer brick (C) to A24 IF multiplexer (P601) Keysight N5227B Service Guide 6-65...
Page 250 A34 port 3 coupler to A28 mixer brick (C) W137 N5227-20013 A35 port 4 coupler to A28 mixer brick (D) W138 N5227-20012 A36 port 2 coupler to A27 mixer brick (B) a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-66 Keysight N5227B Service Guide...
Page 251 Replaceable Parts Replaceable Parts Listings Figure 6-27 Bottom RF Cables, Standard 4-Port Configuration, Option 400 Keysight N5227B Service Guide 6-67...
Page 252 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-68 Keysight N5227B Service Guide...
Page 253 Replaceable Parts Replaceable Parts Listings Figure 6-28 Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 400 Keysight N5227B Service Guide 6-69...
Page 254: 4-Port Configuration, Option 405
All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-70 Keysight N5227B Service Guide...
Page 255 Replaceable Parts Replaceable Parts Listings Figure 6-29 Bottom Assemblies, Option 401 Keysight N5227B Service Guide 6-71...
Page 256 Port 2 CPLR THRU to A36 port 2 coupler N5247-20076 A32 port 2 receiver coupler to front-panel REF 2 SOURCE OUT N5247-20019 A36 port 2 coupler to front-panel port 2 CPLR ARM N5247-20053 Port 1 RCVR A IN to A27 mixer brick (A) 6-72 Keysight N5227B Service Guide...
Page 257 A28 mixer brick (C) to A24 IF multiplexer (P601) W79 - 83, Refer to “Top Cables, All Cables—All Options” on page 6-20. W91 - 98 a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5227B Service Guide 6-73...
Page 258 Replaceable Parts Replaceable Parts Listings Figure 6-30 Bottom RF Cables, Option 401 6-74 Keysight N5227B Service Guide...
Page 259 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5227B Service Guide 6-75...
Page 260 Replaceable Parts Replaceable Parts Listings Figure 6-31 Bottom Ribbon Cables and Wire Harnesses, Option 401 6-76 Keysight N5227B Service Guide...
Page 261: 4-Port Configuration, Option 410
All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5227B Service Guide 6-77...
Page 262 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-78 Keysight N5227B Service Guide...
Page 263 Replaceable Parts Replaceable Parts Listings Figure 6-32 Bottom Assemblies, Option 405 Keysight N5227B Service Guide 6-79...
Page 264 Port 3 RCVR C IN to A28 mixer brick (C) N5247-20073 Port 4 RCVR D IN to A28 mixer brick (D) N5247-20054 Port 2 RCVR B IN to A27 mixer brick (B) N5247-20011 A37 reference mixer switch to front-panel REF 1 SOURCE OUT 6-80 Keysight N5227B Service Guide...
Page 265 Cable, assy-RF, CPLR THRU - Bias T combiner, Port 3 W184 N5247-20164 Cable, assy-RF, Bias T combiner- FP, Port 3 coupler W185 N5247-20165 Cable, assy-RF, Bias T combiner- FP, Port 4 coupler W186 N5247-20171 Cable, assy-RF, CPLR THRU - Bias T combiner, Port 4 Keysight N5227B Service Guide 6-81...
Page 266 Cable, assembly, coaxial LFE (Port 4 bias combiner "RF-IN" to "Port4" A70 LFE board) W197 Cable, assembly, coaxial LFE (Port 2 bias combiner "RF-IN" to "Port2" A70 LFE board) a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-82 Keysight N5227B Service Guide...
Page 267 Replaceable Parts Replaceable Parts Listings Figure 6-33 Bottom RF Cables, Option 405 Keysight N5227B Service Guide 6-83...
Page 268 A19 test set motherboard J543 to A73 port 4 bias tee A19 test set motherboard J544 to A74 port 2 bias tee a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-84 Keysight N5227B Service Guide...
Page 269 Replaceable Parts Replaceable Parts Listings Figure 6-34 Bottom Ribbon Cables and Wire Harnesses, Option 405 Keysight N5227B Service Guide 6-85...
Page 270: 4-Port Configuration, Option 419
All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-86 Keysight N5227B Service Guide...
Page 271 Replaceable Parts Replaceable Parts Listings Figure 6-35 Bottom Assemblies, Option 410 Keysight N5227B Service Guide 6-87...
Page 272 A28 mixer brick (D) to A24 IF multiplexer (P801) N5242-60019 A28 mixer brick (R4) to A24 IF multiplexer (P414) N5242-60020 A28 mixer brick (R3) to A24 IF multiplexer (P413) N5242-60023 A28 mixer brick (C) to A24 IF multiplexer (P601) 6-88 Keysight N5227B Service Guide...
Page 273 A31 port 4 receiver coupler to A66 test port 4 6-dB attenuator W142 N5227-20022 A32 port 2 receiver coupler to A67 test port 2 6-dB attenuator SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5227B Service Guide 6-89...
Page 274 Replaceable Parts Replaceable Parts Listings Figure 6-36 Bottom RF Cables, Option 410 6-90 Keysight N5227B Service Guide...
Page 275 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5227B Service Guide 6-91...
Page 276 Replaceable Parts Replaceable Parts Listings Figure 6-37 Bottom Ribbon Cables and Wire Harnesses, Option 410 6-92 Keysight N5227B Service Guide...
Page 277: 4-Port Configuration, Option 420
Port 4 receiver attenuator Port 2 receiver attenuator 5087-7336 Port 1 70 GHz doubler Port 3 70 GHz doubler Port 4 70 GHz doubler Port 2 70 GHz doubler 08490-60037 3 dB attenuator ➀ N5240-60058 Front-panel LED board Keysight N5227B Service Guide 6-93...
Page 278 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-94 Keysight N5227B Service Guide...
Page 279 Replaceable Parts Replaceable Parts Listings Figure 6-38 Bottom Assemblies, Option 419 Keysight N5227B Service Guide 6-95...
Page 280 Front-panel port 1 CPLR THRU to A42 port 1 bias tee W104 N5247-20022 A33 port 1 coupler to A42 port 1 bias tee W113 N5247-20083 A32 port 2 receiver coupler to A41 port 2 source attenuator 6-96 Keysight N5227B Service Guide...
Page 281 W144 N5247-20071 A29 port 1 receiver coupler to A37 reference mixer switch W145 N5247-20066 REF 2 RCVR R2 IN to A27 mixer brick (R2) a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5227B Service Guide 6-97...
Page 282 Replaceable Parts Replaceable Parts Listings Figure 6-39 Bottom RF Cables, Option 419 (Ports 1 and 2) 6-98 Keysight N5227B Service Guide...
Page 283 A40 port 4 source attenuator to front-panel port 4 SOURCE OUT W111 N5247-20021 Port 4 CPLR THRU to A44 port 4 bias tee W112 N5247-20029 A44 port 4 bias tee to A35 port 4 coupler Keysight N5227B Service Guide 6-99...
Page 284 N5247-20024 Port 4 RCVR D IN to A48 port 4 receiver attenuator W122 N5247-20065 A48 port 4 receiver attenuator to A28 mixer brick (D) a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-100 Keysight N5227B Service Guide...
Page 285 Replaceable Parts Replaceable Parts Listings Figure 6-40 Bottom RF Cables, Option 419 (Ports 3 and 4) Keysight N5227B Service Guide 6-101...
Page 286 A24 IF multiplexer board J1 E4410-60160 A18 system motherboard J13 to A23 test set motherboard J545 8121-0834 Rear-panel HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 6-102 Keysight N5227B Service Guide...
Page 287 Part Number Description Type Designator N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5227B Service Guide 6-103...
Page 288 Replaceable Parts Replaceable Parts Listings Figure 6-41 Bottom Ribbon Cables and Wire Harnesses, Option 419 6-104 Keysight N5227B Service Guide...
Page 289 3 dB attenuator N5291-60001 LFE board 5087-7403 Bias combiner port 1 (includes wire harness) Bias combiner port 3 (includes wire harness) Bias combiner port 4 (includes wire harness) Bias combiner port 2 (includes wire harness) Keysight N5227B Service Guide 6-105...
Page 290 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-106 Keysight N5227B Service Guide...
Page 291 Replaceable Parts Replaceable Parts Listings Figure 6-42 Bottom Assemblies, Option 420 Keysight N5227B Service Guide 6-107...
Page 292 A33 port 1 coupler to A42 port 1 bias tee W113 N5247-20083 A32 port 2 receiver coupler to A41 port 2 source attenuator W114 N5247-20034 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT 6-108 Keysight N5227B Service Guide...
Page 293 Cable, assembly, coaxial LFE (Port 1 bias combiner "RF-IN" to "Port1" A70 LFE board) W197 Cable, assembly, coaxial LFE (Port 2 bias combiner "RF-IN" to "Port2" A70 LFE board) a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5227B Service Guide 6-109...
Page 294 Replaceable Parts Replaceable Parts Listings tion 420 (Ports 1 Figure 6-43 Bottom RF Cables, Op and 2) 6-110 Keysight N5227B Service Guide...
Page 295 Port 4 RCVR D IN to A48 port 4 receiver attenuator W122 N5247-20065 A48 port 4 receiver attenuator to A28 mixer brick (D) W183 N5247-20170 Cable, assy-RF, CPLR THRU - A72 Bias T combiner, Port 3 Keysight N5227B Service Guide 6-111...
Page 296 Cable, assembly, coaxial LFE (Port 3 bias combiner "RF-IN" to "Port3" A70 LFE board) W196 Cable, assembly, coaxial LFE (Port 4 bias combiner "RF-IN" to "Port4" A70 LFE board) a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-112 Keysight N5227B Service Guide...
Page 297 Replaceable Parts Replaceable Parts Listings Figure 6-44 Bottom RF Cables, Option 420 (Ports 3 and 4) Keysight N5227B Service Guide 6-113...
Page 298 Cable, ribbon assembly — MB/IFMUX/LFE/SMB (A14 system mother board J1 to A19 test set motherboard to A70 LFE board to A20 IF Multiplier board E4410-60160 A18 system motherboard J13 to A23 test set motherboard J545 6-114 Keysight N5227B Service Guide...
Page 299 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5227B Service Guide 6-115...
Page 300 Replaceable Parts Replaceable Parts Listings Figure 6-45 Bottom Ribbon Cables and Wire Harnesses, Option 420 6-116 Keysight N5227B Service Guide...
Page 301: Rear-Panel Assembly, All Options
Ferrite for HANDLER I/O ribbon cable assembly 9170-2236 2190-0068 Lock washer (for rear-panel BNC connectors) 2950-0054 Hex nut (for rear-panel BNC connectors) Bottom foot (Refer to “External Hardware and Miscellaneous Parts, All Options” on page 6-129.) Keysight N5227B Service Guide 6-117...
Page 302 Hex nut (for item 8120-5063 BNC cable 6960-0523 Hole plug 6960-0076 Hole plug a. This part number is no longer required on s/n’s 5541, 5542, 5544, 5545, 5547, 5549 and newer. But, is included for your ref- erence. 6-118 Keysight N5227B Service Guide...
Page 303 Replaceable Parts Replaceable Parts Listings Figure 6-46 Rear-panel Assembly, All Options Keysight N5227B Service Guide 6-119...
Page 304: Fan Assemblies, All Options
N5245-00003 Fan bracket (for 3 fans) ➅ 0515-0372 Machine screw, M3.0 x 8, pan head (To attach: fan assemblies to chassis) ➆ Chassis (Refer to “Internal Hardware and Miscellaneous Parts, All Options” on page 6-127.) 6-120 Keysight N5227B Service Guide...
Page 305 Replaceable Parts Replaceable Parts Listings Figure 6-47 Fan Assemblies, Side View, All Options Keysight N5227B Service Guide 6-121...
Page 306: Top Hardware And Miscellaneous Parts, All Options
Machine screw, M3.0 x 20, flat head (To attach source brackets to source (1) and source (2). Not shown 0515-0666 Machine screw, M3.0 x 18, pan head (To attach source brackets to source (1) and source (2). 6-122 Keysight N5227B Service Guide...
Page 307 Replaceable Parts Replaceable Parts Listings Figure 6-48 Top Hardware and Miscellaneous Parts, Top View, All Options Keysight N5227B Service Guide 6-123...
Page 308: Bottom Hardware And Miscellaneous Parts
Brace, 4-port (To connect port 3 & port 4 attenuator/receiver coupler assemblies.) 0515-0375 Machine screw, M3.0 x 16, pan head (To attach 70 GHz doublers to doubler mounts.) N5247-20132 Side brace (To attach attenuator/receiver coupler assemblies to test set.) N5247-20129 Bracket (For both bias tee pairs.) 6-124 Keysight N5227B Service Guide...
Page 309 Machine screw, M4.0 x 0.7, pan head (To attach A24 IF MUX to test set deck.) shown N5242-00019 Stabilizer bracket (Between A23 test set motherboard and A24 IF mux board.) N5247-00017 Cross bracket on test set deck Keysight N5227B Service Guide 6-125...
Page 310 Replaceable Parts Replaceable Parts Listings Figure 6-49 Bottom Hardware and Miscellaneous Parts 6-126 Keysight N5227B Service Guide...
Page 311: Internal Hardware And Miscellaneous Parts, All Options
➅ N5247-00013 Front bracket ➆ N5242-40002 PC board guides Keysight N5227B Service Guide 6-127...
Page 312 Replaceable Parts Replaceable Parts Listings Figure 6-50 Internal Hardware and Miscellaneous Parts, All Options 6-128 Keysight N5227B Service Guide...
Page 313: External Hardware And Miscellaneous Parts, All Options
Machine screw, M3.0 x 6, flat head (To attach: inner cover; front-panel.) Not shown 5023-3074 Front handle 5041-9174 Side strips for front handle 0515-2044 Machine screw, M4.0 x 12 flat head (To attach front handle to chassis.) N9040-40007 Front impact cover N9040-40008 Rear impact cover Keysight N5227B Service Guide 6-129...
Page 314: Miscellaneous Part Numbers
1/2 inch to 9/16 inch (8 mm), open-end wrench 8710-1770 20 mm open-end torque wrench; 0.9 N-m (8 in-lb) 8710-1764 9 mm open-end torque wrench; 2.38 N-m (21 in-lb) Not sold by Keysight Spanner wrench 08513-20014 6-130 Keysight N5227B Service Guide...
Page 315 Installation and Quick Start Guide (for all PNA series analyzers) (Cannot be ordered. Part number E8356-90001 is for reference only. Must be printed from the Keysight Web site.) Service Guide. (Not available in printed form. Part number is for reference only. Must be printed N5227-90001 from the Keysight Web site.)
Page 316 N5231AU-1CP or N5232AU-1CP or N5239AU-1CP Option 1CP includes the following separately orderable items: Rack mount kit (rack mount flanges and hardware) 5063-1555 Rack mount rail set E3663AC 5063-1542 Front handle kit (two classic handles and hardware) 6-132 Keysight N5227B Service Guide...
Page 317 Replaceable Parts Replaceable Parts Listings a. For rack mount use, you must replace factory installed ruggedized handles (thick aluminum, no trim) with classic handles (thin aluminum with plastic trim), included with Option 1CP. Keysight N5227B Service Guide 6-133...
Page 318 Replaceable Parts Replaceable Parts Listings 6-134 Keysight N5227B Service Guide...
Page 319: Repair And Replacement Procedures
2-Port and 4-Port PNA Series Service Guide Repair and Replacement Procedures Information in This Chapter This chapter contains procedures for removing and replacing the major assemblies of your Keysight Technologies PNA series microwave network analyzer. Chapter Seven at-a-Glance Section Title Summary of Content...
Page 320 The front panel switch is only a standby switch and is not a LINE switch (disconnecting device). Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended. Discard used batteries according to manufacturer’s instructions. Keysight N5227B Service Guide...
Page 321 To reduce the chance of electrostatic discharge, follow all of the recommendations outlined in “Electrostatic Discharge Protection” on page 1-7, for all of the procedures in this chapter. Keysight N5227B Service Guide...
Page 322 Port 3 receiver coupler Port 4 receiver coupler Port 2 receiver coupler Port 1 test port coupler page 7-43 Port 3 test port coupler Port 4 test port coupler Port 2 test port coupler Reference mixer switch page 7-45 Keysight N5227B Service Guide...
Page 323 7-56 Port 1 LFE Bias-T combiner - port 1 page 7-62 Port 1 LFE Bias-T combiner - port 3 Port 1 LFE Bias-T combiner - port 4 Port 1 LFE Bias-T combiner - port 2 Keysight N5227B Service Guide...
Page 324: Removing The Covers
Ribbon cables and wires must never be positioned on top of hardware. 3. Reverse the order of the removal procedures above. Keysight N5227B Service Guide...
Page 325: Removing And Replacing The Front Panel Assembly
When reconnecting the front-panel jumpers, torque the connectors to 10 in-lb. 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Keysight N5227B Service Guide...
Page 326 Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly Figure 7-1 Front Panel Assembly Removal Keysight N5227B Service Guide...
Page 327 2. Remove the RPG assembly as outlined above. 3. Disconnect the following cables from the A1 front panel interface board: tape (item [14]) from connector and the LCD display to interface board cable (item [18]), LED driver board (backlight converter board) to interface Keysight N5227B Service Guide...
Page 328 4. Remove two screws (item ) and remove the power switch board. 5. The power button keypad can now be removed from the power switch board by gently pulling each of the rubber tabs through the PC board. 7-10 Keysight N5227B Service Guide...
Page 329 10.With a T-6 TORX (set to 3-in-lb), remove the 2 screws (item 23) on the 2nd side bracket (item [21]). During re-assembly of the side brackets to the LCD display, it is very important to avoid over-tightening. Keysight N5227B Service Guide 7-11...
Page 330 11.The touch screen can now be removed from the front panel assembly. Note the orientation of the touch screen in the front panel assembly for installation of the new touch screen. Figure 7-2 Front Panel Sub-assemblies Removal 7-12 Keysight N5227B Service Guide...
Page 331 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-3 A3 Display Assembly with LCD Display - Cables Figure 7-4 Remove LCD Cable, LCD to LED Inverter Board Cable, & Side Brackets Keysight N5227B Service Guide 7-13...
Page 332 Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-5 Remove LCD Mounting Plate to LCD Display & LCD Display Cable Figure 7-6 Removing the Flat Flex Cable from the LCD to the Controller Board 7-14 Keysight N5227B Service Guide...
Page 333 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-7 Power Keypad to Power Button Boards Figure 7-8 Remove Speaker Assembly and Mounting Foam Keysight N5227B Service Guide 7-15...
Page 334 Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. 7-16 Keysight N5227B Service Guide...
Page 335: Removing And Replacing The A4-A17 Boards
This may require moving a load from the old board to the new board or removing the load from the new board. Keysight N5227B Service Guide 7-17...
Page 336 The A4, A15, and A17 synthesizer boards will not perform correctly and will cause the PNA to display errors until the Synthesizer Bandwidth Adjustment and the EE Default Adjustment are completed, as per Table 7-2 on page 7-74 7-18 Keysight N5227B Service Guide...
Page 337: Removing And Replacing The A18 System Motherboard
A18 System Motherboard. Refer to Figure 6-50 on page 6-128 for steps 14 and 15. 1. Remove four screws (item A) that secure the bottom of the midplane bracket to the chassis. Keysight N5227B Service Guide 7-19...
Page 338 Keep them for reinstallation on the replacement motherboard. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. 7-20 Keysight N5227B Service Guide...
Page 339 Repair and Replacement Procedures Removing and Replacing the A18 System Motherboard Figure 7-9 A18 System Motherboard Removal Keysight N5227B Service Guide 7-21...
Page 340: Removing And Replacing The A19 Midplane Board
Remember to install the six rubber grommets on the bottom three alignment pins. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. 7-22 Keysight N5227B Service Guide...
Page 341 Repair and Replacement Procedures Removing and Replacing the A19 Midplane Board Figure 7-10 A19 Midplane Board Removal Keysight N5227B Service Guide 7-23...
Page 342: Removing And Replacing The A20 Power Supply Assembly
5. Slide the A20 power supply assembly out the rear of the analyzer. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. 7-24 Keysight N5227B Service Guide...
Page 343 Repair and Replacement Procedures Removing and Replacing the A20 Power Supply Assembly Figure 7-11 A20 Power Supply Assembly Removal Keysight N5227B Service Guide 7-25...
Page 344: Removing And Replacing The A21 Cpu Board Assembly
(SSD)” on page 7-52. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. 7-26 Keysight N5227B Service Guide...
Page 345 Repair and Replacement Procedures Removing and Replacing the A21 CPU Board Assembly Figure 7-12 A21 CPU Board Assembly Removal Keysight N5227B Service Guide 7-27...
Page 346 6. Slide the A22 GPIB board out the rear of the analyzer. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. 7-28 Keysight N5227B Service Guide...
Page 347: Removing And Replacing The A22 Gpib Board
Repair and Replacement Procedures Removing and Replacing the A22 GPIB Board Figure 7-13 A22 GPIB Board Removal Keysight N5227B Service Guide 7-29...
Page 348: Removing And Replacing The A23 Test Set Motherboard
A23 test set motherboard. 5. Remove connector hardware from 11 rear panel BNC connectors. 6. Remove connector hardware from the rear panel TEST SET I/O connector. 7. Remove 10 screws (item C) from the A23 test set motherboard. 7-30 Keysight N5227B Service Guide...
Page 349 Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Keysight N5227B Service Guide 7-31...
Page 350 Repair and Replacement Procedures Removing and Replacing the A23 Test Set Motherboard This page intentionally left blank. 7-32 Keysight N5227B Service Guide...
Page 351: Removing And Replacing The A24 If Multiplexer Board
Torque rear panel RF connector nuts to 21 in-lbs and PULSE I/O connector screws to 6 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Keysight N5227B Service Guide 7-33...
Page 352 Repair and Replacement Procedures Removing and Replacing the A24 IF Multiplexer Board Figure 7-14 A24 IF Multiplexer Board Removal 7-34 Keysight N5227B Service Guide...
Page 353 1. Reverse the order of the removal procedure. Torque all RF cable connectors to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Keysight N5227B Service Guide 7-35...
Page 354 Repair and Replacement Procedures Removing and Replacing the A25 HMA26.5 Figure 7-15 A25 HMA26.5 Removal 7-36 Keysight N5227B Service Guide...
Page 355: Removing And Replacing The A26 Splitter
1. Reverse the order of the removal procedure. Torque all RF cable connections to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Keysight N5227B Service Guide 7-37...
Page 356 Repair and Replacement Procedures Removing and Replacing the A26 Splitter Figure 7-16 A26 Splitter Removal 7-38 Keysight N5227B Service Guide...
Page 357: Removing And Replacing The A27 And A28 Mixer Bricks
9. If replacing a mixer brick, remove 3 screws (not shown) that fasten each mixer brick to the mixer brick mounting block. ⑤ 10. If replacing the A28 mixer brick, remove the 3 dB pads (item ) and keep it for reinstallation on the replacement mixer brick. Keysight N5227B Service Guide 7-39...
Page 358 Torque all RF cable connections to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Figure 7-17 A27 and A28 Mixer Bricks Removal 7-40 Keysight N5227B Service Guide...
Page 359: Brackets
Orient the position of the receiver couplers and brackets as shown in Figure 7-19. Torque all RF connectors to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Keysight N5227B Service Guide 7-41...
Page 360 Repair and Replacement Procedures Removing and Replacing the A29 –A32 Receiver Couplers and Receiver Coupler Mounting Brackets Figure 7-18 A29 through A32 Receiver Couplers Removal Figure 7-19 Orientation of Receiver Couplers with Brackets 7-42 Keysight N5227B Service Guide...
Page 361: Removing And Replacing The A33-A36 Test Port Couplers
Torque all connectors to 10 in-lbs. Torque coupler nuts to 72 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Keysight N5227B Service Guide 7-43...
Page 362 Repair and Replacement Procedures Removing and Replacing the A33–A36 Test Port Couplers Figure 7-20 A33 through A36 Test Port Couplers Removal 7-44 Keysight N5227B Service Guide...
Page 363: Removing And Replacing The A37 Reference Mixer Switch
) and torque the connectors to 10 in-lbs, then tighten the ➁ two mounting screws (item 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Keysight N5227B Service Guide 7-45...
Page 364 Repair and Replacement Procedures Removing and Replacing the A37 Reference Mixer Switch Figure 7-21 A37 Reference Mixer Switch Removal 7-46 Keysight N5227B Service Guide...
Page 365 8. Remove two screws from each attenuator to be removed from the mounting bracket. Replacement Procedure 1. Reverse the order of the removal procedure. Orient the position of the attenuators and brackets as shown in Figure 7-23. Torque all cable connections to 10 in-lbs. Keysight N5227B Service Guide 7-47...
Page 366 Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver Attenuators 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Figure 7-22 Source and Receiver Attenuators 7-48 Keysight N5227B Service Guide...
Page 367 Repair and Replacement Procedures Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver Attenuators Figure 7-23 Orientation of Source and Receiver Attenuators with Brackets Keysight N5227B Service Guide 7-49...
Page 368: Removing And Replacing The A42-A45 Bias Tees
Orient the position of the bias tees and block as shown in Figure 7-25. Torque all cable connections to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. 7-50 Keysight N5227B Service Guide...
Page 369 Repair and Replacement Procedures Removing and Replacing the A42–A45 Bias Tees Figure 7-24 A42 through A45 Bias Tees Removal Figure 7-25 Orientation of Bias Tees with Block Keysight N5227B Service Guide 7-51...
Page 370: Removing And Replacing The A55 Solid State Drive (Ssd)
Copy Unique Files from the Solid State Drive If installing an SSD for Windows XP: if the user has loaded unique calibration kit information, navigate to C:\Program Files\Keysight\Network Analyzer and copy USER_CALKITFILE to a USB flash memory drive. Also copy any personal user files that you wish to preserve.
Page 371 Removing and Replacing the A55 Solid State Drive (SSD) The files that were previously saved onto a USB flash memory drive must now be installed onto the new SSD. The network analyzer must be powered up and operating. Keysight N5227B Service Guide 7-53...
Page 372: Removing And Replacing The A60-A63 70 Ghz Doublers
Disconnect these cables and remove the doubler mounting bracket, with the two doublers attached, from the analyzer. 9. Remove three screws that attach the doubler to be replaced to its mounting bracket, and remove the doubler from the bracket. Replacement Procedure 7-54 Keysight N5227B Service Guide...
Page 373 Torque all cable connections to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Figure 7-27 A60 through A63 70 GHz Doublers Removal Keysight N5227B Service Guide 7-55...
Page 374: Removing And Replacing The A70 Or A75 Low Frequency Extension (Lfe) Board
2. Remove the outer cover. Refer to “Removing the Covers” on page 7-6. 3. Position the analyzer bottom side up. 4. Remove the A19 test set motherboard. Refer to “Removing and Replacing the A23 Test Set Motherboard” on page 7-30. 7-56 Keysight N5227B Service Guide...
Page 375 Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board 5. Disconnect the 8121-2919 and N5245-60005 ribbon cables. Refer to Figure 7-28 on page 7-57. Figure 7-28 Disconnect Ribbon Cables from Rear Panel Connectors (8121-2919, N5245-60005) Keysight N5227B Service Guide 7-57...
Page 376 ) from the A70 LFE board. Refer to Figure 7-29 on page 7-58. Figure 7-29 A70 LFE Board Remove Cables (8120-5014 (x2), 8120-5017 (x3), N5242-60078, N5242-60080). 4-Port is Shown. 2-Ports are Similar, but with Less Cables. 7-58 Keysight N5227B Service Guide...
Page 377 Remove A71 bias combiner cable (N5240-60097) from "Port1" connector on the A70 LFE board N5240-60097 8. A70 LFE boards only: Remove port 3 bias combiner "RF IN" cable from the "Port3" connector on the LFE board. Similar to Figure 7-30 on page 7-59. Keysight N5227B Service Guide 7-59...
Page 378 A74 port 2 bias combiner cable (N5240-60097) from "Port2" connector on the A70 LFE board 10. A70 LFE boards only: Remove port 4 bias combiner "RF IN" cable from the "Port4" connector on the LFE board. Similar to Figure 7-31 on page 7-60. 7-60 Keysight N5227B Service Guide...
Page 379 Attach the new A70 LFE board to the standoffs using the screws removed from the old one. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Keysight N5227B Service Guide 7-61...
Page 380: Removing And Replacing The A71-A74 Bias Tee Combiners
Figure 7-33 on page 7-64. See also Figure 7-35 on page 7-65. 7. Remove two screws that attach the bias tee combiner to the bracket (Now ➁ do item ). Refer to Figure 7-34 on page 7-64. 7-62 Keysight N5227B Service Guide...
Page 381 Figure 7-34 on page 7-64, position the bias tees on the attenuator brackets as indicated. 3. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Keysight N5227B Service Guide 7-63...
Page 382 A71–A74 Bias Tee Combiners and Cables Removal. (N5222B Option 420 Shown. All Other PNA LFE Options are Similar. Figure 7-34 Remove Bias Combiner Bracket Assemblies from the Chassis (N5245-00036/N5245-00037, 0515-0372, 5087-7403, 0515-1227). (All Assemblies are Shown, but Only Remove the Defective Assembly.) 7-64 Keysight N5227B Service Guide...
Page 383 Removing and Replacing the A71–A74 Bias Tee Combiners Figure 7-35 Remove Bias Combiner, Cables, and Clamps (5023-3299, 5087-7403, 0515-2141, and N5240-60097). (All Assemblies are Shown, but Only Remove the Defective Assembly.) Figure 7-36 Mark Bias Combiner With a Permanent Marker Keysight N5227B Service Guide 7-65...
Page 384: Removing And Replacing The Rear Panel
10.Slide the rear panel over the cable connectors and off of the analyzer. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. 7-66 Keysight N5227B Service Guide...
Page 385 Repair and Replacement Procedures Removing and Replacing the Rear Panel Figure 7-37 Rear Panel Removal Keysight N5227B Service Guide 7-67...
Page 386: Removing And Replacing The Front Panel Led Boards
6-49 on page 6-126. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. 7-68 Keysight N5227B Service Guide...
Page 387 Repair and Replacement Procedures Removing and Replacing the Front Panel LED Boards This page intentionally left blank. Keysight N5227B Service Guide 7-69...
Page 388: Removing And Replacing The Fans
⑤ c. Pull out the rivet completely (as shown by (item ) in the illustration) to release the fan and fan guard. Replacement Procedure 1. Reverse the order of the removal procedure. 7-70 Keysight N5227B Service Guide...
Page 389 Repair and Replacement Procedures Removing and Replacing the Fans 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. Figure 7-38 B1 Fan Removal Keysight N5227B Service Guide 7-71...
Page 390: Removing And Replacing The Lithium Battery
1. Reverse the order of the removal procedure following all instructions included with the new battery. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-74. 7-72 Keysight N5227B Service Guide...
Page 391 Repair and Replacement Procedures Removing and Replacing the Lithium Battery Figure 7-39 Lithium Battery Removal Keysight N5227B Service Guide 7-73...
Page 392: Post-Repair Procedures
IF Gain Adjustment Source Power Accuracy Test Receiver Characterization Source Maximum Power Output Receiver Adjustment Test IF Response Adjustment Source Power Linearity Test (Available Only with Option The Operator’s Check S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) 7-74 Keysight N5227B Service Guide...
Page 393 IF Gain Adjustment Source Power Accuracy Test Receiver Characterization Source Maximum Power Output Receiver Adjustment Test IF Response Adjustment Source Power Linearity Test (Available Only with Option The Operator’s Check S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) Keysight N5227B Service Guide 7-75...
Page 394 Synthesizer Bandwidth Source Maximum Power Output Test Adjustment Source Power Linearity Test Source Adjustment The Operator’s Check IF Gain Adjustment Receiver Characterization Receiver Adjustment IF Response Adjustment (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) 7-76 Keysight N5227B Service Guide...
Page 395 IF Gain Adjustment Source Power Accuracy Test Receiver Characterization Source Maximum Power Output Receiver Adjustment Test IF Response Adjustment Source Power Linearity Test (Available Only with Option The Operator’s Check S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) Keysight N5227B Service Guide 7-77...
Page 396 The Operator’s Check A38–A41 source step attenuators Source Adjustment Source Maximum Power Output IF Gain Adjustment Test Receiver Characterization Calibration Coefficients Test Receiver Adjustment IF Response Adjustment (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) 7-78 Keysight N5227B Service Guide...
Page 397 (Available with Option 205, 220, 405, and 420) B1 fan No adjustment needed Check for fan operation Battery No adjustment needed None a. Synthesizer Bandwidth Adjustment is only required, when the EE Default Adjustment is not sufficient. Keysight N5227B Service Guide 7-79...
Page 398 If a backup copy of receiver calibration data from the faulty disk drive is available, it can be copied to the new disk drive. If not, new data must be generated by performing the “Receiver Adjustment.” 7-80 Keysight N5227B Service Guide...
Page 399: General Purpose Maintenance Procedures
Keysight Microwave Network Analyzers 2-Port and 4-Port PNA Series Service Guide General Purpose Maintenance Procedures Information in This Chapter Chapter Eight at-a-Glance Section Title Summary of Content Start Page Error Terms How to use error terms as a preventive maintenance and page 8-2 troubleshooting tool.
Page 400: Error Terms
You can use the error terms as a tool to isolate faulty assemblies in the signal separation group of your analyzer. You can compare the current values to preventive maintenance records or to the typical values listed in Table 8-1 on page 8-8. Keysight N5227B Service Guide...
Page 401: Performing Measurement Calibration
Figure 8-4 illustrate the error terms associated with measurement calibration for 1-port, 2-port, 3-port, and 4-port configurations respectively. Figure 8-1 Flowgraph of One-Port Error Terms for Port 1 where: E = Error term Subscript: D = Directivity Keysight N5227B Service Guide...
Page 402 R = Reflection Tracking X = Crosstalk (Isolation) L = Load Match T = Transmission Tracking 2nd Subscript: F = forward measurement (Ports 1 to Port 2) R = reverse measurement (Ports 2 to Port 1) Keysight N5227B Service Guide...
Page 403 For the case of a full 3-port calibration, port 1 has three Match error terms: S11 source match S12 load match S13 load match and three Tracking error terms: S11 reflection tracking S12 transmission tracking S13 transmission tracking There are six isolation terms not shown. Keysight N5227B Service Guide...
Page 404: Accessing Error Terms
Tracking error terms: S11 reflection tracking S12 transmission tracking S13 transmission tracking S12 transmission tracking There are eight isolation (crosstalk) terms not shown. Accessing Error Terms Error terms can be accessed either manually or programmatically: Manually Keysight N5227B Service Guide...
Page 405 You can access error terms by way of Component Object Model (COM) or Distributed Component Object Model (DCOM) software architecture. For more information on COM and DCOM, refer to the embedded help in the analyzer. Type in keyword “errors, systematic” in the index. Keysight N5227B Service Guide...
Page 406: Error Term Data
All crosstalk values are typical. Measurement conditions: normalized to a thru, measured with two shorts, 10 Hz IF bandwidth, averaging factor of 8, alternate mode, source power set to the lesser of the maximum power out or the maximum receiver power. Keysight N5227B Service Guide...
Page 407 2-port device. The match of test port cables is included in this response. Load match error terms are characterized by measuring the S and S responses of a “thru” configuration during the calibration procedure. Keysight N5227B Service Guide...
Page 408 After verifying the cable and its connections, suspect the analyzer switch splitter, step attenuator, coupler, or receivers, and associated cabling. To troubleshoot, refer to “Checking the Receiver Group” on page 4-46 or to “Checking the Signal Separation Group” on page 4-41. 8-10 Keysight N5227B Service Guide...
Page 409: Keysight License Manager
Keysight License Manager Accessing the Keysight License Manager To start the Keysight License Manager: — Press Start > Keysight License Manager > Keysight License Manager . A Keysight License Manager dialog box will appear. Figure 8-5 Keysight License Manager Window Software Entitlement Certificate If you have received an “Software Entitlement Certificate”, follow the...
Page 410: Enabling Or Removing Options
Keysight License Manager (KLM). Refer to http://literature.cdn.keysight.com/litweb/pdf/N5242-90024.pdf Some applications require a license key file that is provided by Keysight. If you do not have the required license key file, contact Keysight for assistance. Refer to “Contacting Keysight”...
Page 411: Installing Or Changing A Serial Number
It is necessary to reinstall the instrument serial number if the test set midplane board is replaced. To change an incorrect serial number, it is necessary for your instrument to be connected directly to the LAN and to a Keysight IP network. Refer to “Contacting Keysight” on page 2-6.
Page 412: Firmware Upgrades
— Press UTILITY , then Service , then AgileUpdate System AgileUpdate compares the firmware revision currently installed in your network analyzer to the latest version available and assists you in downloading and installing the most recent version. 8-14 Keysight N5227B Service Guide...
Page 413: Operating System Recovery
Recovering from Hard Disk Drive Problems If you suspect that you have a hard disk drive problem, go to the “Hard Drive Recovery” link on the Keysight PNA Series: Service & Support Home Page on the Internet. The URL for the Keysight PNA Series: Service & Support Home Page is: http://na.support.keysight.com/pna/...
Page 414: Correction Constants
— Navigate to the EEPROM Backup Utility, located at: C:\Program Files\Keysight\Network Analyzer\Service\eebackup.exe — Run the program. — Click Backup EEPROM. — Click Backup TSMB Mem. — Click Exit when the program has finished. 8-16 Keysight N5227B Service Guide...
Page 415 This information is subject to change without notice. © Keysight Technologies 2011-2020 Edition 1, May 2020 N5227-90026 www.keysight.com...

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